CONTINUOUS CASTING METHOD OF HOLLOW ROUND SECTION CAST STEEL AND CONTINUOUS CASTING MOLD OF HOLLOW SECTION CAST STEEL

摘要

PROBLEM TO BE SOLVED: To provide a continuous casting method of hollow cast steel by which breakout is hardly caused, and even if the breakout is caused, a secondary disaster due to the occurrence of phreatic explosion can be prevented, and the cast steel having good quality can be obtained.;SOLUTION: A continuous casting method of hollow round section cast steel uses a cylindrical outer casting mold and a columnar core mold each of which has a water-cooled structure, and which are concentrically disposed. The core mold includes a plurality of cooling water flow paths penetrating from an upper edge to a lower edge in the vicinity of a surface, and a vent hole penetrating from the upper edge to the lower edge in the center. The continuous casting method of the hollow round section cast steel is characterized in that a cooling water supplied from the upper edge of the cooling water flow path of the core mold and discharged from the lower edge cools the inner surface of the hollow round section cast steel during casting from the point directly under the core mold. Preferably, the core mold is longer than the outer casting mold in the casting direction, and the lower edge of the core mold projects more than the lower edge of the outer casting mold.;COPYRIGHT: (C)2014,JPO&INPIT